8 results about "Traffic noise" patented technology

The utility model discloses an active type composite energy -conserving vertical sound type barrier, including composite screen body, the flexible photovoltaic board of laying in the outside surface of composite screen body, at least one sound intensity sensor, the impulse ultrasonic generator for generating and emitting ultrasonic wave of eliminating noise, power supply circuit and control unit. The utility model takes ultrasonic generator active mode and carries out the noise reduction, satisfies the requirement of sensitive area noise value, integrates the flexible photovoltaic board on the surface of composite screen body, utilizes solar energy and has realized the energy self -sufficiency of system, the composite screen body of upper portion inwardly inclined will most traffic noise reflect back road area, improves the noise reduction effect and can make flexible photovoltaic board maximum receive solar radiation, provides more electric energy, the intensity and frequency spectrum of two sound intensity sensor noise value, adjusts the emission angle and frequency of impulse ultrasonic generator and other working parameters, realizes more accurate, efficient directional noise elimination.

The utility model discloses a sound absorption barrier of flower shape structure, including screen body, and the sound absorption component of uniform distribution on screen body, and the sound absorption component includes first noise reduction part and second noise reduction part, the outer peripheral surface of first noise reduction part is equipped with several consistent sharp corners, and is surrounded in first noise reduction part outside through a plurality of sharp corners, first noise reduction part and second noise reduction part are evenly distributed on the length direction of screen body, and second noise reduction part is located the below of first noise reduction part. Above all, through the screen body surface formation sound absorption component, and two noise reduction parts on sound absorption component can absorb traffic noise, specifically, utilize two noise reduction parts and the mutual cooperation of sharp corner, can reduce its overall energy to the multiple interference effect of alternating reflection and scattering of traffic noise on the screen body surface, so that the equipment can utilize self structure to complete the absorption and reduction of noise. Have based on this, the utility model is worth promoting and application.

This invention provides an adaptive active noise cancellation device based on bimodal perception, relating to the field of active noise cancellation technology. The device includes a main unit comprising: a microphone array module for acquiring ambient noise signals; an active noise cancellation processing module electrically connected to the microphone array module for real-time processing of the acquired noise signals to generate inverse sound wave signals; and a scene recognition module electrically connected to the microphone array module for real-time analysis of the audio signals acquired by the microphone array and identification of noise types, including at least traffic noise, mechanical noise, water flow noise, and snoring. This invention achieves targeted noise cancellation by using the scene recognition module to identify noise types in real-time and automatically matching the optimal noise cancellation strategy; and by using a position sensing module and various modular bases to achieve adaptive noise cancellation optimization for different placement positions.

The application discloses a noise-reducing type concrete crash barrier for viaducts and a crash barrier assembly, which comprises a wall body, a sound-absorbing channel is arranged in the wall body, both ends of the sound-absorbing channel extend to the inner side of the wall body, the lower end of the sound-absorbing channel extends to a channel cover plate, the channel cover plate is fixed to the wall body and covers the lower end of the sound-absorbing channel, the upper end of the sound-absorbing channel extends to a sound-absorbing plate arranged along the wall body, the sound-absorbing plate is fixed to the inner side of the wall body and covers the upper end of the sound-absorbing channel, and a sound-absorbing coating is arranged on the inner surface of the sound-absorbing channel. The crash barrier has good noise-reducing effect and reduces the influence of viaduct traffic noise on the surrounding residents' life.

The application provides a highway side slope geological disaster early warning method and system, and belongs to the technical field of geological survey monitoring, and comprises the following steps: obtaining the side slope soil theoretical displacement of each key monitoring point at each monitoring moment according to the change condition of the effective displacement amount of the key monitoring point in a rain-free period and the side slope moisture penetration characteristic value; obtaining the structure damage degree of each key monitoring point at the current monitoring moment according to the difference condition between the side slope soil theoretical displacement of the key monitoring point at each monitoring moment and the effective displacement amount and the side slope moisture penetration characteristic value; and early warning of the geological disaster of the highway side slope based on the structure damage degree. The application effectively avoids the interference of the traffic noise of the highway and the wet swelling physical property of the side slope soil, and thus improves the accuracy and foresight of the side slope geological disaster early warning.

A method for fine-grained traffic noise prediction includes obtaining location data indicating one or more locations and, for each respective location of the one or more locations, location-specific traffic data. The method includes, for each respective location of the one or more locations, using various computational models to predict a vehicle count and a vehicle class mix for the respective location; calculating, based on the predicted vehicle count and the predicted vehicle class mix, a number of vehicles per vehicle class for the respective location; and calculating, based on the number of vehicles per vehicle class, a predicted noise level for the respective location. The method includes causing a client device to display a map. The map may include, for each location of the one or more locations, a visual indication of the predicted noise level for the respective location.

This invention provides a tunable gradient-curved sound barrier structure and method based on 3D printing, belonging to the field of environmental noise control technology. The sound barrier unit is fabricated using an integrated molding process. Its core lies in the internal construction of a folded, curled topological skeleton with a gradient distribution along the sound wave propagation direction. This skeleton extends vertically to form a three-dimensional solid. The geometry and spacing of the internal folded channels can be parametrically adjusted to achieve precise matching with the target noise spectrum characteristics. In terms of manufacturing process and materials, this invention employs selective laser sintering technology, using modified microporous nylon composite material as raw material. For highway traffic noise scenarios, this structure effectively extends the sound wave propagation path and induces sound energy dissipation by utilizing gradient-changing folded channels, achieving efficient insertion loss in the two energy-concentrated frequency bands of 315-500Hz and 800-1250Hz. Simultaneously, combined with the micropores and high damping characteristics of the material, it effectively suppresses the coincidence effect.